Keggin-Type Heteropolyacid for Ring-Opening Polymerization of Cyclohexene Oxide: Molecular Weight Control

Figure 5

Typical DSC thermograms of the prepared PCHO obtained at a heating rate of 20°C/min. Polymerization catalyzed by 0.2 g of H₃PW₁₂O₄₀ during 3 hours in CH₂Cl₂.